Col. Hiltrud G. "Hilli" (Spors) Houle
B: 1935-06-13
D: 2019-08-24
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Houle, Col. Hiltrud G. "Hilli" (Spors)
Robert George Dow
B: 1930-07-29
D: 2019-08-14
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Dow, Robert George
Elliot John Walsh
B: 1939-07-16
D: 2019-08-13
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Walsh, Elliot John
Henry S. "Hank" Allard III
B: 1944-12-02
D: 2019-08-04
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Allard III, Henry S. "Hank"
Theresa A. (LaGrassa) Boisvenue
B: 1961-12-20
D: 2019-08-03
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Boisvenue, Theresa A. (LaGrassa)
Margot B. Reed
B: 1928-05-27
D: 2019-07-31
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Reed, Margot B.
Carol M. (Larsen) Dargin
B: 1929-02-01
D: 2019-07-29
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Dargin, Carol M. (Larsen)
Virginia S. "Ginny" Hershberger
B: 1934-05-13
D: 2019-07-29
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Hershberger, Virginia S. "Ginny"
Thelma A. (Nurnberger) Elliott
B: 1921-06-05
D: 2019-07-25
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Elliott, Thelma A. (Nurnberger)
Allen Herbert Nelson
B: 1929-02-14
D: 2019-07-20
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Nelson, Allen Herbert
Lisa Mary (Ford) Caputo
B: 1960-02-22
D: 2019-07-19
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Caputo, Lisa Mary (Ford)
David J. McQuiggan
B: 1940-04-21
D: 2019-07-18
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McQuiggan, David J.
Nancy Clark-Chiarelli
B: 1954-04-24
D: 2019-07-15
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Clark-Chiarelli, Nancy
Michael T. McA'Nulty
B: 1956-03-03
D: 2019-07-12
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McA'Nulty, Michael T.
Robert Ole Anderson
B: 1924-01-29
D: 2019-07-11
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Anderson, Robert Ole
Jack D. Staley
B: 1944-01-15
D: 2019-07-10
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Staley, Jack D.
Barbara M. (Mitzcavitch) Brooks
D: 2019-06-29
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Brooks, Barbara M. (Mitzcavitch)
Susan Caroline (Frayer) Weber
B: 1953-06-05
D: 2019-06-29
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Weber, Susan Caroline (Frayer)
Patricia Anne (Sampson) Wellington
B: 1923-09-10
D: 2019-06-25
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Wellington, Patricia Anne (Sampson)
Marcus C. "Marc" Dalli
B: 1974-09-10
D: 2019-06-25
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Dalli, Marcus C. "Marc"
Carmella V. (Palmer) Ford
B: 1918-03-27
D: 2019-06-22
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Ford, Carmella V. (Palmer)


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470 Massachusetts Avenue
PO Box 882
Acton, MA 01720
Phone: 978-263-5333
Fax: 978-263-8193
Mack D. O'Brien, Jr.

Mack D. O'Brien, Jr.

Tuesday, February 26th, 2019
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ACTON, MA: Mack D. O’Brien, Jr., passed away peacefully Tuesday, February 26, 2019 surrounded by his family. He was 75.

Mr. O’Brien was the husband of the late Lucia (Madigan) O’Brien, to whom he was married almost 50 years at the time of her passing on December 12, 2016. He is survived by their children and families: Patrick O’Brien and wife Jennie of Hanover, MA, Andrew O’Brien and wife Helena of Franklin, MA, and Betsy Sullivan and fiancé Jamison Merriam of Acton, MA. He was affectionately known as “Grampy” and “Biggie” to his grandchildren: Leah, Sam, Jack, Ellie, Maggie, Brian & John.

Born in Louisville, Kentucky and raised in Franklin, Kentucky, he was the son of the late Mack D. and Gertrude (Winkler) O’Brien. Mr. O’Brien lived in Nashville, TN for a time before graduating from Webb School, then earned a bachelor’s degree in engineering from Yale. He was employed for 38 years at M.I.T.’s Draper Lab in Cambridge where he was a Director before retiring.

Mr. O’Brien enjoyed golfing and cooking, and loved time spent with his grandkids. He especially looked forward to vacations at the family camp on East Grand Lake in Weston, Maine, where the family enjoyed tubing, water sports and relaxing. He also loved animals, especially his “granddogs” Dublin, Rosie and Jazz.

Family and friends are invited to visiting hours Saturday, March 2nd from 8:30-11:00 A.M. at the Acton Funeral Home, 470 Massachusetts Ave (Rte 111) Acton. All are invited to a gathering to follow at 11:30 A.M. at the Red Raven Restaurant, 3 Nagog Park (off Rte 2A) in Acton. Interment in Woodlawn Cemetery in Acton Center is private at a later date. Memorial gifts may be made in Mr. O'Brien's name to the charity or organization of one's choice. Memorial page
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Service Details

  • Visitation

    Saturday, March 2nd, 2019 | 8:30am - 11:00am
    Saturday, March 2nd, 2019 8:30am - 11:00am
    Acton Funeral Home
    470 Massachusetts Avenue
    ACTON, MA 01720
    Get Directions: View Map | Text | Email
    Interment in Woodlawn Cemetery, Acton Center, will be private at a later date. Memorial contribution may be made in Mr. O'Brien's name to the charity or organization of one's choice.
  • Interment

    Woodlawn Cemetery
    104 Concord Road
    Acton Center, MA 01720
    Get Directions: View Map | Text | Email
  • Reception

    Red Raven
    3 Nagog Park
    ACTON, MA 01719
    Get Directions: View Map | Text | Email
    Following the visiting hours, all are invited to a gathering at the Red Rave Restaurant beginning at 11:30 A.M.


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Private Condolence

Bill Williams

Posted at 06:56pm
so sorry to hear of Mac's passing. I always enjoyed getting the boat ready for he and Lucia and delivering it to the point.
If only one could tap those big hemlock trees and relive the good
times had by them . sail on Mac. All the best to the family, Willy

David F Winkler

Posted at 10:25am
Kentucky's loss and Massachusetts' gain. Rest in peace, Mack. David Winkler

Roger Medeiros

Posted at 11:21am
I have a lot of pleasant memories of times with Mack. We worked together, on and off, at Draper for about 35 years. I remember the office we shared in IL6 when he first joined the Lab. In the summer we had a choice of soot through the open window or closing the window and suffering with the heat - no AC. There were the lunches with the DSRV folks often at the European but later at someone's nearby apartment. There were the evenings when Lucia would be involved with the local theatre. We would go to the show then back to their home to sing old country songs while Lucia played the piano. Then of course there was the field assignment in San Diego when we lived in the same apartment complex so would car pool to work leaving a car for the wives and boys. My son Stephen still remembers Andrew and Patrick. The years have gone bye but Mack and Lucia have left behind some wonderful memories for a lot of people. Roger Medeiros

Maureen and Bob Steinmann

Posted at 11:17am
Dear Pat, Andy and Betsy, We were so sorry to read about your dad. He was such a wonderful man, a loving, caring husband and father. Our hearts go out to you all. Love, Maureen and Bob Steinmann

Karthik/ Kalpana

Posted at 06:11pm
Deeply saddened to learn of the passing of Mr. O'Brien. He was the first to welcome us to the neighborhood when we moved in to Acton right across from his house. He always had a pleasant smile despite his illness. May his soul rest in peace.
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